Light-emitting device and mount therefor

ABSTRACT

A light emitting device and a holder thereof are provided, the light emitting device comprises a light emitting module, a holder, and a heat dissipate member formed with fastening holes in a surface thereof. The light emitting module comprises a substrate, a light emitting package, and at least two contact pads. The holder comprises a body, a bracket, at least two terminals pressed against the corresponding contact pads, and at least two latching members. The body has a top surface, a bottom surface, and a receiving opening and a plurality of fixing holes which penetrate through the top surface and the bottom surface. The receiving opening comprises an upper opening and a lower opening formed in the bottom surface of the body. The bracket is connected with the body and provided to the receiving opening for the light emitting module to abut against. By that the latching members are provided alongside the lower opening of the bottom surface of the body, when the light emitting module is assembled into the receiving opening, the latching members completely latch and fix the substrate into the receiving opening, so as to make the light emitting module not easily disengaged from the holder before the whole assembling is completed.

V. DESCRIPTION OF THE PRESENT DISCLOSURE

Field of the Present Disclosure

The present disclosure relates to a light emitting device having a lightemitting diode (LED), and specifically relates to a holder for mountinga light emitting diode module and a light emitting device comprising theholder.

Background of the Present Disclosure

A light emitting device fabricated with a Light Emitting Diode (LED) hasadvantages of high energy conversion efficiency, a short response time,a long service life and a small volume or the like which are better thana conventional tungsten lamp, therefore it is widely concerned andpositively researched and developed by many countries in recent years.

But an existing light emitting device with the light emitting diodetypically assembles a light emitting diode array in a holder and thenlocks the holder to a heat dissipate device so as to make the lightemitting diode array clipped via a cooperation of the holder and theheat dissipate device to complete the fixing operation. For example, aTaiwanese patent application No. TW100200669 (corresponding to a PCTPublication number WO 2011/088212 A2, a Chinese patent application No.CN201120042217.0 and a Chinese patent application No. CN201180004948.9)discloses a holder of a light emitting device. A frame of the holder isformed with an inner opening for receiving the light emitting diodearray, and the inner opening is provided with a bracket therein. Ashoulder comprised in the bracket is used to for the light emittingdiode array to securely abut against, and a support protrusion and asecond protrusion are engaged with positioning elements of the lightemitting diode array for alignment. The frame of the holder, togetherwith the light emitting diode array, can be fixed to the heat dissipatedevice with a conventional fastening element (for example a screw),thereby completing assembling of the light emitting device.

However, in the holder disclosed in the above patent, although thesupport protrusion and the second protrusion can be engaged with thepositioning elements of the light emitting diode array to assist thealignment operation during assembling, the light emitting diode arraycan not be completely fixed to the holder. And because the holder hasterminals pressing against an upper surface of the light emitting diodearray, the light emitting diode array is subjected to a force pushingdownwardly, when the holder is not locked to the heat dissipate deviceby a screw, the light emitting diode array is pushed by the terminalsand can not be fixed and fit to the holder, so it is quite easy to makethe light emitting diode array disengaged from the inner opening of theholder in the assembling operation.

Moreover, there is not any member which can assist to guide the lightemitting diode array into the inner opening when the light emittingdiode array is assembled into the inner opening of the holder, so it isnot easy to guide the light emitting diode array to be rapidly andaccurately engaged with the holder. Moreover, there is not anypositioning device between the holder and the heat dissipate device inthe prior art, so when the holder and the heat dissipate device need tobe mutually locked by the screw, firstly relative positions of theholder and the heat dissipate device are accurately adjusted to makelock holes of them aligned with each other, thereby increasingdifficulty of the whole assembling operation and lowering the assemblingefficiency.

SUMMARY OF THE PRESENT DISCLOSURE

Hereafter, an object of the present disclosure is to provide a holderfor stably and completely fixing a light emitting module thereon.

Another object of the present disclosure is to provide a holder whichhas an alignment mechanism together with a heat dissipate member.

Another object of the present disclosure is to provide a holder with aneffect of guiding the light emitting module to be assembled.

Another object of the present disclosure is to provide a light emittingdevice which has the above holder.

Therefore, a light emitting device of the present disclosure comprises alight emitting module, a holder for assembling the light emitting moduleand a heat dissipate member for locking with the holder. The lightemitting module comprises a substrate and a light emitting packageprovided on the substrate. The substrate is provided with at least twocontact pads electrically connected to the light emitting package.

The holder comprises a body, a bracket connected with the body, at leasttwo terminals provided to the body, and at least two latching members.The body has a top surface, a bottom surface, and a plurality of fixingholes and a receiving opening which penetrate through the top surfaceand the bottom surface. The receiving opening comprises an upper openingformed in the top surface and a lower opening formed in the bottomsurface for assembling the light emitting module into the receivingopening. The each fixing hole is used for a corresponding cooperativelocking member to pass through the holder. The bracket is connected withthe body and provided to the receiving opening for the light emittingmodule to abut against when the light emitting module is assembled intothe receiving opening. The each terminal comprises a resilient pressingportion to downwardly press against the corresponding contact pad.

The each latching member is provided alongside the lower opening of thebottom surface of the body, and latch the substrate to completely fixthe substrate into the receiving opening when the light emitting moduleis assembled into the receiving opening. A surface of the heat dissipatemember is formed with an receiving hole for receiving the correspondinglatching member, and a fastening hole for the corresponding lockingmember to pass through and lock.

In an embodiment, the holder further comprises at least two positioningposts respectively provided at the bottom surface of the body. The eachpositioning post has an alignment portion, a shape of which correspondsto a periphery of the substrate for the substrate to be aligned with thereceiving opening. The surface of the heat dissipate member is furtherformed with positioning holes for the positioning posts to pass throughand position; when the positioning posts are provided through thepositioning holes, positions of the fixing holes of the holdercorrespond to positions of the fastening holes of the heat dissipatemember.

The effects of the present disclosure are: by that the bottom surface ofthe body of the holder is provided with the latching members, the lightemitting module is latched by the latching members and stably andcompletely fixed to the holder after the light emitting module isassembled into the holder, and does not disengage from the holder beforethe holder and the heat dissipate member are locked. Moreover, by adesign that the holder and the heat dissipate member respectively havethe positioning posts and the positioning holes, alignments between thefixing holes and the fastening holes is completed after the positioningposts insert into the positioning holes, an additional operation thatthe fixing holes and the fastening holes are aligned is omitted, therebyimproving the efficiency of assembling process. Moreover, since thepositioning post is provided with the alignment portion, and provides aguiding mechanism before the light emitting module is assembled into thereceiving opening of the holder, which makes the assembling of the lightemitting module and the holder more easier.

DETAILED DESCRIPTION

The foregoing and other technical contents, features and effects of thepresent disclosure will be apparent through the following detaileddescription for a specific embodiment in combination with the drawings.

Referring to FIGS. 1-4, a light emitting device of an embodiment of thepresent disclosure comprises a light emitting module 1, a holder 2 forassembling the light emitting module 1 therein, and a heat dissipatemember 3 for locking with the holder 2 to each other. The light emittingmodule 1 comprises a substrate 11, and a light emitting package 12provided on the substrate 11 for emitting light. The substrate 11 isprovided with two contact pads 111 electrically connected to the lightemitting package 12 to transmit an external power to the light emittingpackage 12. In the embodiment, the light emitting module 1 is a lightemitting module packaging a light emitting diode.

The holder 2 comprises a body 21, a bracket 22 connected with the body21, two terminals 23 provided to the body 21, two positioning posts 24,and two latching members 25. The body 21 has a top surface 211, a bottomsurface 212, and two fixing holes 213 and a receiving opening 214 whichpenetrate through the top surface 211 and the bottom surface 212. Thereceiving opening 214 is used to receive the light emitting package 12when the light emitting package 12 is assembled into the holder 2, andcomprises an upper opening 215 formed in the top surface 211, and alower opening 216 formed in the bottom surface 212 for assembling thelight emitting module 1 into the receiving opening 214. A shape of thelower opening 216 is a polygon having a plurality of corners, in theembodiment, the shape of the lower opening 216 is a rectangular shape,and a periphery of the substrate 11 of the light emitting module 1 is arectangular shape corresponding to the shape of the lower opening 216.The two fixing holes 213 are respectively provided for two lockingmembers (not shown) to pass through the holder 2, so as to fix theholder 2 to the heat dissipate member 3 by locking from the lockingmembers. Herein, the locking member can be selected from any memberhaving a locking function, such as a screw, a rivet or a positioning pinor the like.

The bracket 22 is provided to the receiving opening 214, and comprises ashoulder 221 protruding into the receiving opening 214. The shoulder 221is recessed relative to the bottom surface 212 and is parallel to thebottom surface 212, and is used for the substrate 11 of the lightemitting module 1 to fit upwardly and abut against when the substrate 11of the light emitting module 1 is assembled into the receiving opening214, so as to limit the light emitting module 1 by the shoulder 221 in adirection that the light emitting module 1 is assembled into the holder2. The two terminals 23 each comprise a resilient pressing portion 231extending into the receiving opening 214. The resilient pressingportions 231 press downwardly against the corresponding contact pads 111of the substrate 11, and transmit the external power to the lightemitting package 12 to put the function of lighting of the lightemitting package 12 into effect via the electrical connection betweenthe contact pads 111 and the light emitting package 12.

The positioning posts 24 are provided at the bottom surface 212 of thebody 21, and are positioned at opposite corners which are adjacent to aperiphery of the lower opening 216. The each positioning post 24 has analignment portion 241, a shape of which corresponds to a periphery ofthe substrate 11, which assists to guide the substrate 11 to be alignedwith the receiving opening 214 when the substrate 11 is assembled intothe receiving opening 214. In the embodiment, the positioning posts 24are cylinders, and the shape of the alignment portion 241 is aright-angle alignment groove formed by cutting away correspondingone-quarter cylinder of the positioning post 24 correspondingly to thecorner of the lower opening 216, and the two right-angle alignmentgrooves are used for two opposite corners of the substrate 11 to passthrough and be aligned. It should be noted that, the positioning posts24 are not necessary positioned at the two opposite corners of the loweropening 216, and they just needs to be positioned at the periphery ofthe lower opening 216 to form the alignment portions 241 for guidingassembling of the substrate 11. Furthermore, the shape of the alignmentportion 241 is not limit to the embodiment, in an equivalent embodiment,the alignment portion 241may also be a non right-angle notch orprotruding block, as long as the shape of the alignment portion 241correspondingly match the periphery of the substrate 11 to guide thesubstrate 11 to be smoothly aligned and assembled with the lower opening216.

The two latching members 25 of the holder 2 are provided at two oppositeside edges 217 alongside the lower opening 216 of the bottom surface 212of the body 21, and are respectively positioned at opposite two sides ofa line connecting center points of the two side edges 217, and arerespectively adjacent to the two positioning posts 24 but positionsthereof are not symmetric. Herein, the latching members 25 each have aresilient arm 251 extending from the body 21 along the side edge 217,and a hook 252 formed at a tip end of the resilient arm 251. When thelight emitting module 1 is assembled into the holder 2, two oppositesides of the substrate 11 respectively abut against and push the twohooks 252, which makes the hooks 252 drive the resilient arms 251 toproduce elastic deformation and move toward the corresponding side edges217, thereby making the light emitting module 1 smoothly enter into thereceiving opening 214. But after the light emitting module 1 isassembled into the receiving opening 214, the hook 252 returns to itsoriginal position by the recovering elastic force of the resilient arm251, and latches on a bottom surface (see FIG. 5) of the substrate 11 tomake the light emitting module 1 limited by the latching member 25 inthe direction of disengaging from the receiving opening 214.

By the above mutual cooperation of the latching members 25 and theshoulder 221, the light emitting module 1 is completely fixed in thereceiving opening 214, therefore the light emitting module 1 will notdisengage from the receiving opening 214 of the holder 2 due to abuttingand pressing from the resilient pressing portions 231 of the terminals23. In the embodiment, the configuration that the positions of the twolatching members 25 are not symmetric makes the substrate 11 not easilyflip over and disengage from the receiving opening 214 after thesubstrate 11 is latched by the hooks 252, the fixing effect of thelatching member 25 is more stable. Moreover, the two hooks 252 each areformed with a slope 253 at an opposite inner side, which makes the lightemitting module 1 suffer a smooth guide when the light emitting module 1is assembled into the receiving opening 214 and abut against and pushthe hook 252, and makes the light emitting module 1 more easily enterinto the receiving opening 214.

A surface of the heat dissipate member 3 is formed with two positioningholes 31, two receiving holes 32, and two fastening holes 33 for thecorresponding locking members to pass through and lock. When the heatdissipate member 3 is engaged with the holder 2, the two positioningposts 24 of the holder 2 are first respectively provided through andlimited in the corresponding positioning holes 31 of the heat dissipatemember 3, at this time, by the mutual positioning between thepositioning posts 24 and the positioning holes 31, positions of thefixing holes 213 of the holder 2 and positions of the fastening holes 33of the heat dissipate member 3 corresponds to each other, a lockingmember can easily pass through the fixing hole 213 and the fasteninghole 33 at the same time to be securely locked to the heat dissipatemember 3, an additional process of making the fixing holes 213 alignedwith the fastening holes 33 is not required, thereby improving theconvenience of the whole assembling. The two receiving holes 32 of theheat dissipate member 3 are respectively used to receive the latchingmembers 25 of the holder 2. In a modified embodiment, a cooperation ofthe latching member 25 and the receiving hole 32 can also attain theeffect of making the holder 2 pre-positioned on the heat dissipatemember 3.

In conclusion, by that the holder 2 is provided with the latchingmembers 25 for latching and fixing the light emitting module 1, thelight emitting module 1 will be stably and completely fixed with theholder 2 after the light emitting module 1 is assembled into the holder2, thereby overcoming the disadvantage of the prior art that the lightemitting diode array easily disengages from its holder before the wholeassembling is completed. Moreover, the positioning posts 24 of theholder 2 and the positioning holes 31 of the heat dissipate member 3 aremutually engaged and positioned, so after the positioning posts 24 ofthe holder 2 are inserted into the positioning holes 31, alignments ofthe fixing holes 213 and the fastening holes 33 would be completed toallow the locking member to smoothly pass through, which does notrequire an additional process of making the fixing holes 213 alignedwith the fastening holes 33, thereby improving efficiency of the wholeassembling. Moreover, by that the positioning post 24 is provided withthe alignment portion 241, the shape of which is matched with theperiphery of the substrate 11 of the light emitting module 1, there is aguiding mechanism when the light emitting module 1 is assembled into thereceiving opening 214, and the light emitting module 1 is more easilyaligned with and engaged with the receiving opening 214.

What have been described above are only embodiments of the presentdisclosure, the implementation scope of the present disclosure is notlimited to that, that is, simple equivalent variations and modificationsmade according to the Claims and the description content of the presentdisclosure are still included in the protective scope of the presentdisclosure.

BRIEF DESCRIPTION OF THE DRAWINGS OF THE PRESENT DISCLOSURE

FIG. 1 is a perspective view illustrating a light emitting device of anembodiment of the present disclosure;

FIG. 2 is an exploded view illustrating constituent members of theembodiment;

FIG. 3 is an exploded view illustrating constituent members of theembodiment viewed from an angle different from FIG. 2;

FIG. 4 is an assembled view illustrating an assembled status of thelight emitting module and the holder; and

FIG. 5 is a cross-sectional view taken along a line V-V of FIG. 1illustrating that a latching member latches and fixes the light emittingmodule.

DESCRIPTION OF REFERENCE NUMERALS FOR MAIN ELEMENTS:

1 light emitting module 221 shoulder 11 substrate 23 terminal 111contact pad 231 resilient pressing portion 12 light emitting package 24positioning post 2 holder 241 alignment portion 21 body 25 latchingmember 211 top surface 251 resilient arm 212 bottom surface 252 hook 213fixing hole 253 slope 214 receiving opening 3 heat dissipate member 215upper opening 31 positioning hole 216 lower opening 32 receiving hole217 side edge 33 fastening hole 22 bracket

What is claimed is:
 1. A holder, comprising: a body having a topsurface, a bottom surface and a receiving opening penetrating throughthe top surface and the bottom surface, the receiving opening comprisingan upper opening formed in the top surface and a lower opening formed inthe bottom surface; a shoulder connected with the body and protrudinginto the receiving opening and recessed relative to the bottom surface;at least two terminals provided to the body and each comprising aresilient pressing portion extending into the receiving opening; and atleast two latching members respectively provided alongside the loweropening of the bottom surface of the body.
 2. The holder according toclaim 1, wherein the holder further comprises at least two positioningposts respectively provided at the bottom surface of the body.
 3. Theholder according to claim 2, wherein the lower opening is a polygon witha plurality of corners; at least two positioning posts are respectivelypositioned at the at least two corners of the lower opening and eachhave an alignment groove having a shape corresponding to the corner ofthe lower opening and formed by cutting.
 4. The holder according toclaim 3, wherein the lower opening is a rectangular shape, thepositioning posts are cylinders; the each alignment groove is aright-angle notch formed by cutting away corresponding one-quartercylinder of the positioning post correspondingly to a shape of thecorner of the lower opening.
 5. The holder according to claim 2, whereinpositions of the latching members are respectively adjacent to thepositioning posts.
 6. The holder according to claim 1, wherein a tip endof the each latching member is formed with a hook.
 7. The holderaccording to claim 6, wherein the each latching member further has aresilient arm extending along a side edge of the lower opening.
 8. Alight emitting device, comprising: a light emitting module comprising asubstrate and a light emitting package provided on the substrate, thesubstrate being provided with at least two contact pads electricallyconnected to the light emitting package; a holder comprising: a bodyhaving a top surface, a bottom surface, and a receiving opening and aplurality of fixing holes which penetrate through the top surface andthe bottom surface, the receiving opening comprising an upper openingformed in the top surface and a lower opening formed in the bottomsurface for assembling the light emitting module into the receivingopening, the each fixing hole is provided for a correspondingcooperative locking member to pass through the holder; a bracketconnected with the body and provided to the receiving opening for thelight emitting module to abut against when the light emitting module isassembled into the receiving opening; at least two terminals provided tothe body and each comprising a resilient pressing portion to downwardlypress against a corresponding contact pad; and at least two latchingmembers respectively provided alongside the lower opening of the bottomsurface of the body and latching and fixing the substrate into thereceiving opening when the light emitting module is assembled into thereceiving opening; and a heat dissipate member formed with receivingholes in a surface thereof for receiving the corresponding latchingmembers and fastening holes for the corresponding locking members topass through and lock; positions of the fixing holes of the holdercorresponding to positions of the fastening holes of the heat dissipatemember.
 9. The light emitting device according to claim 8, wherein a tipend of the each latching member is formed with a hook.
 10. The lightemitting device according to claim 9, wherein the each latching memberfurther has a resilient arm extending along a side edge of the loweropening.
 11. The light emitting device according to claim 8, wherein thebracket comprises a shoulder protruding into the receiving opening; theshoulder is recessed relative to the bottom surface.
 12. The lightemitting device according to claim 8, wherein the holder furthercomprises at least two positioning posts respectively provided at thebottom surface of the body; the surface of the heat dissipate member isfurther formed with positioning holes for the positioning posts to passthrough and position; when the positioning posts are provided throughthe positioning holes, positions of the fixing holes of the holdercorrespond to positions of the fastening holes of the heat dissipatemember.
 13. The light emitting device according to claim 12, wherein theeach positioning post has an alignment portion, a shape of whichcorresponds to a periphery of the substrate, for the substrate to bealigned with the receiving opening.
 14. The light emitting deviceaccording to claim 13, wherein the lower opening is a polygon with aplurality of corners, at least two positioning posts are positioned atthe at least two corners of the lower opening.
 15. The light emittingdevice according to claim 14, wherein the alignment portion of thepositioning post is an alignment groove having a shape corresponding tothe corner of the lower opening and formed by cutting.
 16. The lightemitting device according to claim 15, wherein the lower opening is arectangular shape, the positioning posts are cylinders; the eachalignment groove is a right-angle notch formed by cutting awaycorresponding one-quarter cylinder of the positioning postcorrespondingly to a shape of the corner of the lower opening.